Why not allow hydroelectric dams as well?

This article says that wind power has been legalized in Suffolk, where there is no wind:

"Federal government estimates of Suffolk’s potential to use wind as an energy resource are not kind to the idea. The U.S. Department of Energy rates the city as a 1 on a scale of 7 for its resource potential. In fact, most of Virginia receives the same 'poor' ranking, as wind power and speed are relatively low in all portions of the state except for the Chesapeake Bay and coastal areas."